From patchwork Sat Oct 1 00:26:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Latypov X-Patchwork-Id: 12996144 X-Patchwork-Delegate: brendanhiggins@google.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2985C433FE for ; Sat, 1 Oct 2022 00:27:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232274AbiJAA1Z (ORCPT ); Fri, 30 Sep 2022 20:27:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33100 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232657AbiJAA1A (ORCPT ); Fri, 30 Sep 2022 20:27:00 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFBA81CF for ; Fri, 30 Sep 2022 17:26:48 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id y5-20020a25bb85000000b006af8f244604so5115653ybg.7 for ; Fri, 30 Sep 2022 17:26:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=NEg2UNzhugdAp054uzB1fjyZlTKV+IDmlPKtVI1Rou4=; b=DC9XtIzCxpTKCO6GS4PJLU8yLC6nZUZ81Xq/XkgrjTOFfSEnxSueP+PxaqX6MRpQNo wJuFToy4coT1kB9n/j7i+aJikBGzzYcYz7O/Nhbjv0objPyqomYpaPBHIEz6CdQtWQtU m16zhORNmSoiMauyBaRZEy0HeeI8zdCryXHACZagr+tjhvoy4apexvOtD/PPIHAdy8dM f3kdzSeFaJQGfwQpr/7Ddzp//lsQbyXoCu90tz5YWmzob2UV0sB6IqU2iH38/Lh0kwr3 SngsM3HaZPWrJh8fhYu8Bzlv2abb+f22GcJ7luH6yIST9jy6ZisZgYZO/CtVjSkgbyHz lgmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=NEg2UNzhugdAp054uzB1fjyZlTKV+IDmlPKtVI1Rou4=; b=B+Y9YFhRU2sTO5aylVXUWuGauarJWKqGymGzN7lfPdHmiEzUOf4jNI4SICHs48kGxb Ixw/3Ai8GRW6T/2rZ0lr1Vy6gL4NigM4WEgQUyyqp5lRrwcH3NDW9/IqjNR4XyQmsxQ5 hu678Yh97bysUMTIg+BZoOUYQgP7g7rgpcI5VIc6Dn0dWdB/FEUqpx7CrNxO3xgg8aQu 64AePuMGK7SuGQ0yfopH56nkXN4ABBvMq5ehTD0N1SoZ8R5MBOH3z0oakalrR7xrODb4 QwCR7+41fq/Yk5ExSaItZjEWOa8eU/7jl8f01U88KwosTDlsLoBH9Zzs47wVjXJ3qJkP KYGQ== X-Gm-Message-State: ACrzQf15RTIqlGxRGC5iFQMG/UJCV0yuy4Q1HosXt82HeQ1UjJ5tgefN iWZEDKBSifYHBDiiTjWOQN/+D/Uk96wSmg== X-Google-Smtp-Source: AMsMyM5+EXF3DUU8+VvZr1/7b/bGHnSKI8SVwNHpkpimiQlJaZuEPPsQs+WThQ/7g7BoiOCU/RnkEyiL43I38A== X-Received: from dlatypov-spec.c.googlers.com ([fda3:e722:ac3:cc00:24:72f4:c0a8:3f35]) (user=dlatypov job=sendgmr) by 2002:a25:af48:0:b0:6a9:455a:ff10 with SMTP id c8-20020a25af48000000b006a9455aff10mr10736229ybj.84.1664584008001; Fri, 30 Sep 2022 17:26:48 -0700 (PDT) Date: Fri, 30 Sep 2022 17:26:35 -0700 In-Reply-To: <20221001002638.2881842-1-dlatypov@google.com> Mime-Version: 1.0 References: <20221001002638.2881842-1-dlatypov@google.com> X-Mailer: git-send-email 2.38.0.rc1.362.ged0d419d3c-goog Message-ID: <20221001002638.2881842-2-dlatypov@google.com> Subject: [PATCH 1/4] kunit: remove format func from struct kunit_assert, get it to 0 bytes From: Daniel Latypov To: brendanhiggins@google.com, davidgow@google.com Cc: linux-kernel@vger.kernel.org, kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, skhan@linuxfoundation.org, miguel.ojeda.sandonis@gmail.com, Daniel Latypov Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Each calll to a KUNIT_EXPECT_*() macro creates a local variable which contains a struct kunit_assert. Normally, we'd hope the compiler would be able to optimize this away, but we've seen cases where it hasn't, see https://groups.google.com/g/kunit-dev/c/i3fZXgvBrfA/m/GbrMNej2BAAJ. In changes like commit 21957f90b28f ("kunit: split out part of kunit_assert into a static const"), we've moved more and more parts out of struct kunit_assert and its children types (kunit_binary_assert). This patch removes the final field and gets us to: sizeof(struct kunit_assert) == 0 sizeof(struct kunit_binary_assert) == 24 (on UML x86_64). This also reduces the amount of macro plumbing going on at the cost of passing in one more arg to the base KUNIT_ASSERTION macro and kunit_do_failed_assertion(). Signed-off-by: Daniel Latypov Reviewed-by: David Gow --- include/kunit/assert.h | 28 ++++++---------------------- include/kunit/test.h | 17 +++++++++++------ lib/kunit/test.c | 7 ++++--- 3 files changed, 21 insertions(+), 31 deletions(-) diff --git a/include/kunit/assert.h b/include/kunit/assert.h index 4b52e12c2ae8..ace3de8d1ee7 100644 --- a/include/kunit/assert.h +++ b/include/kunit/assert.h @@ -42,16 +42,15 @@ struct kunit_loc { /** * struct kunit_assert - Data for printing a failed assertion or expectation. - * @format: a function which formats the data in this kunit_assert to a string. * * Represents a failed expectation/assertion. Contains all the data necessary to * format a string to a user reporting the failure. */ -struct kunit_assert { - void (*format)(const struct kunit_assert *assert, - const struct va_format *message, - struct string_stream *stream); -}; +struct kunit_assert {}; + +typedef void (*assert_format_t)(const struct kunit_assert *assert, + const struct va_format *message, + struct string_stream *stream); void kunit_assert_prologue(const struct kunit_loc *loc, enum kunit_assert_type type, @@ -71,16 +70,6 @@ void kunit_fail_assert_format(const struct kunit_assert *assert, const struct va_format *message, struct string_stream *stream); -/** - * KUNIT_INIT_FAIL_ASSERT_STRUCT - Initializer for &struct kunit_fail_assert. - * - * Initializes a &struct kunit_fail_assert. Intended to be used in - * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros. - */ -#define KUNIT_INIT_FAIL_ASSERT_STRUCT { \ - .assert = { .format = kunit_fail_assert_format }, \ -} - /** * struct kunit_unary_assert - Represents a KUNIT_{EXPECT|ASSERT}_{TRUE|FALSE} * @assert: The parent of this type. @@ -110,7 +99,6 @@ void kunit_unary_assert_format(const struct kunit_assert *assert, * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros. */ #define KUNIT_INIT_UNARY_ASSERT_STRUCT(cond, expect_true) { \ - .assert = { .format = kunit_unary_assert_format }, \ .condition = cond, \ .expected_true = expect_true \ } @@ -145,7 +133,6 @@ void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert, * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros. */ #define KUNIT_INIT_PTR_NOT_ERR_STRUCT(txt, val) { \ - .assert = { .format = kunit_ptr_not_err_assert_format }, \ .text = txt, \ .value = val \ } @@ -190,7 +177,6 @@ void kunit_binary_assert_format(const struct kunit_assert *assert, * KUNIT_INIT_BINARY_ASSERT_STRUCT() - Initializes a binary assert like * kunit_binary_assert, kunit_binary_ptr_assert, etc. * - * @format_func: a function which formats the assert to a string. * @text_: Pointer to a kunit_binary_assert_text. * @left_val: The actual evaluated value of the expression in the left slot. * @right_val: The actual evaluated value of the expression in the right slot. @@ -200,11 +186,9 @@ void kunit_binary_assert_format(const struct kunit_assert *assert, * fields but with different types for left_val/right_val. * This is ultimately used by binary assertion macros like KUNIT_EXPECT_EQ, etc. */ -#define KUNIT_INIT_BINARY_ASSERT_STRUCT(format_func, \ - text_, \ +#define KUNIT_INIT_BINARY_ASSERT_STRUCT(text_, \ left_val, \ right_val) { \ - .assert = { .format = format_func }, \ .text = text_, \ .left_value = left_val, \ .right_value = right_val \ diff --git a/include/kunit/test.h b/include/kunit/test.h index 840a2c375065..3476549106f7 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -472,9 +472,10 @@ void kunit_do_failed_assertion(struct kunit *test, const struct kunit_loc *loc, enum kunit_assert_type type, const struct kunit_assert *assert, + assert_format_t assert_format, const char *fmt, ...); -#define KUNIT_ASSERTION(test, assert_type, pass, assert_class, INITIALIZER, fmt, ...) do { \ +#define KUNIT_ASSERTION(test, assert_type, pass, assert_class, assert_format, INITIALIZER, fmt, ...) do { \ if (unlikely(!(pass))) { \ static const struct kunit_loc __loc = KUNIT_CURRENT_LOC; \ struct assert_class __assertion = INITIALIZER; \ @@ -482,6 +483,7 @@ void kunit_do_failed_assertion(struct kunit *test, &__loc, \ assert_type, \ &__assertion.assert, \ + assert_format, \ fmt, \ ##__VA_ARGS__); \ } \ @@ -493,7 +495,8 @@ void kunit_do_failed_assertion(struct kunit *test, assert_type, \ false, \ kunit_fail_assert, \ - KUNIT_INIT_FAIL_ASSERT_STRUCT, \ + kunit_fail_assert_format, \ + {}, \ fmt, \ ##__VA_ARGS__) @@ -524,6 +527,7 @@ void kunit_do_failed_assertion(struct kunit *test, assert_type, \ !!(condition) == !!expected_true, \ kunit_unary_assert, \ + kunit_unary_assert_format, \ KUNIT_INIT_UNARY_ASSERT_STRUCT(#condition, \ expected_true), \ fmt, \ @@ -581,8 +585,8 @@ do { \ assert_type, \ __left op __right, \ assert_class, \ - KUNIT_INIT_BINARY_ASSERT_STRUCT(format_func, \ - &__text, \ + format_func, \ + KUNIT_INIT_BINARY_ASSERT_STRUCT(&__text, \ __left, \ __right), \ fmt, \ @@ -639,8 +643,8 @@ do { \ assert_type, \ strcmp(__left, __right) op 0, \ kunit_binary_str_assert, \ - KUNIT_INIT_BINARY_ASSERT_STRUCT(kunit_binary_str_assert_format,\ - &__text, \ + kunit_binary_str_assert_format, \ + KUNIT_INIT_BINARY_ASSERT_STRUCT(&__text, \ __left, \ __right), \ fmt, \ @@ -659,6 +663,7 @@ do { \ assert_type, \ !IS_ERR_OR_NULL(__ptr), \ kunit_ptr_not_err_assert, \ + kunit_ptr_not_err_assert_format, \ KUNIT_INIT_PTR_NOT_ERR_STRUCT(#ptr, \ __ptr), \ fmt, \ diff --git a/lib/kunit/test.c b/lib/kunit/test.c index b73d5bb5c473..53bf1793f915 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -247,7 +247,7 @@ static void kunit_print_string_stream(struct kunit *test, static void kunit_fail(struct kunit *test, const struct kunit_loc *loc, enum kunit_assert_type type, const struct kunit_assert *assert, - const struct va_format *message) + assert_format_t assert_format, const struct va_format *message) { struct string_stream *stream; @@ -263,7 +263,7 @@ static void kunit_fail(struct kunit *test, const struct kunit_loc *loc, } kunit_assert_prologue(loc, type, stream); - assert->format(assert, message, stream); + assert_format(assert, message, stream); kunit_print_string_stream(test, stream); @@ -287,6 +287,7 @@ void kunit_do_failed_assertion(struct kunit *test, const struct kunit_loc *loc, enum kunit_assert_type type, const struct kunit_assert *assert, + assert_format_t assert_format, const char *fmt, ...) { va_list args; @@ -296,7 +297,7 @@ void kunit_do_failed_assertion(struct kunit *test, message.fmt = fmt; message.va = &args; - kunit_fail(test, loc, type, assert, &message); + kunit_fail(test, loc, type, assert, assert_format, &message); va_end(args);